The Miami Heat will probably be a playoff team in the dismal East, but without LeBron James, the South Beach squad has been struggling mightily. Luol Deng, though shooting well, is an obvious downgrade at the small forward position. Dwyane Wade is getting old. No one has really asserted himself as a starting point guard. But they’ve had flashes of success, and they’ll tap into their spurned-lover rage as they take on the Cavaliers tonight at the Q. Tipoff’s at 8 p.m. Tickets start at $25. (Sam Allard)